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Questions in biology
📝 Answered - What are the major effects of the ozone hole?
📝 Answered - Which of the following replaces guanine in RNA? A. adenine B. thymine C. cytosine D. uracil E. none of the above
📝 Answered - Which structure is correctly paired with its function? 1) Ovary - provides milk for newborns 2) Testis - development of sperm 3) Placenta - storage of released eggs 4) Uterus - produces estrogen
📝 Answered - Identify two ways in which industrial development has affected ecosystems.
📝 Answered - Explain why the percentage of resistant bacteria increased over time.
📝 Answered - The central nervous system consists of: a. all the nervous tissue that lies outside the central nervous system. b. just your brain. c. just your spinal cord. d. your brain and spinal cord.
📝 Answered - Wastes are excreted from mollusks via the: a. outer shell b. nerve fibers c. radula d. nephridia
📝 Answered - In the 1940s and 1950s, scientists conducted experiments to determine the molecule responsible for heredity. Their experiments demonstrated that the molecule that encodes and transmits information in organisms is A. DNA. B. glucosamine. C. insulin. D. vitamin D.
📝 Answered - Which activity would most likely increase the mutation rate in a culture of bacteria being grown in a laboratory experiment? 1) Adding more distilled water to the culture 2) Adding excess nutrients to the culture 3) Exposing the culture to a higher concentration of CO2 4) Exposing the culture to ultraviolet radiation
📝 Answered - Predict how two different herbivores can share the same plant resource.
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